Update options used in CI builds for testing compatibility

Testing disabling 3.0 compatibility is useless as it's disabled by
default in master, so disable 3.2 compatibility instead.

Also enable 3.0 compatibility for one of the builds to check that doing
this still works too.

.github/workflows/ci.yml

@@ -95,7 +95,7 @@ jobs:
           - name: Ubuntu 18.04 wxGTK 3 STL
             runner: ubuntu-latest
             container: ubuntu:18.04
-            configure_flags: --enable-stl --disable-compat30
+            configure_flags: --enable-stl --enable-compat30
             use_xvfb: true
           - name: Ubuntu 20.04 wxGTK 3 with clang
             runner: ubuntu-20.04
@@ -104,7 +104,7 @@ jobs:
             use_xvfb: true
           - name: Ubuntu 22.04 wxGTK with ASAN
             runner: ubuntu-22.04
-            configure_flags: --disable-compat30 --disable-sys-libs --disable-webview
+            configure_flags: --disable-compat32 --disable-sys-libs --disable-webview
             skip_samples: true
             use_asan: true
             use_xvfb: true

.github/workflows/ci_msw_cross.yml

@@ -73,7 +73,7 @@ jobs:
       matrix:
         include:
           - name: wxMSW 64 bits
-            configure_flags: --enable-stl --disable-compat30
+            configure_flags: --enable-stl --disable-compat32
           - name: wxMSW 32 bits
             triplet: i686-w64-mingw32
     env: